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【简答题】
带电颗粒在电场中的泳动速度以____表示。
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】The meeting was________ when the speaker became ill. [ ]
A.
cut in
B.
cut short
C.
cut out
D.
cut up
【单选题】His health had deteriorated while he was in prison.
A.
became better
B.
became worse
C.
became stronger
D.
became weaker
【简答题】压气机增压比的定义是：（），反映了气流在压气机内（）。